Phylogeny is important to everyday life in human society. How did the research team in China use phylogeny as a guide to discover new plants that can be used to benefit people?
The research team used DNA to uncover phylogenetic relationships in the legume family, and they found a compound in the plant that is effective in treating cancer.
The research team used DNA to uncover phylogenetic relationships in the legume family, and then they identified a newly discovered plant as Dalbergia sissoo.
The research team used DNA to uncover phylogenetic relationships in the legume family, and they found a DNA marker that can be used to screen for plants with potential medicinal properties.
The research team searched all the relatives of the newly discovered plant Dlabergia sissoo to find antifungal properties.
10.
Analyze the figure provided to answer the following: Which of the animals shown belong to a clade that includes animals with hair? Which evolved first, hair or the amniotic egg?
The rabbit and human belong to the clade of animals with hair. Hair evolved before the amniotic egg.
The rabbit belongs to the clade of animals with hair. Hair evolved before the amniotic egg.
The rabbit and human belong to the clade of animals with hair. The amniotic egg evolved before hair.
The lancelet belongs to the clade of animals with hair. Hair evolved before the amniotic egg.
What is the largest clade in the preceding diagram?
Animals, Fungi, and Plants
Fungi
Diplomonads
Flagellates
12.
Why is it important for scientists to distinguish between homologous and analogous characteristics before building phylogenetic trees?
Phylogenetic trees are based on evolutionary connections, so scientists can use the analogous characteristics to build the phylogenetic trees.
Phylogenetic trees are based on evolutionary connections, so scientists can use the homologous characteristics to build the phylogenetic trees.
Phylogenetic trees are based on similar functions, so scientists can use the analogous characteristics to build the phylogenetic trees.
Phylogenetic trees are based on similar functions, so scientists can use the analogous characteristics to build the phylogenetic trees.
13.
Describe an analogous structure.
A penguin and a seagull both have wings. The penguin uses wings to swim while the seagull uses wings to fly.
Lizards and whales have similar skeleton structures, but they have a different habitat and lifestyle.
Birds and butterflies have wings with similar characteristics for flight even though their wings do not share an evolutionary relationship.
The bone structure in leg of a cat is very similar to the bone structure in the arm of a human, but the functions of the limbs are very different.
14.
What is the ring of life?
a phylogenetic model where all three domains of life evolved from a pool of primitive prokaryotes
an evolutionary history and relationship of an organism or group of organisms
a phylogenetic model that attempts to incorporate the effects of horizontal gene transfer on evolution
a field of organizing and classifying organisms based on evolutionary relationships
15.
Some individual prokaryotes were responsible for transferring the bacteria that caused mitochondrial development to the new eukaryotes, whereas other species transferred the bacteria that gave rise to chloroplasts. This statement best describes which model?
ring of life
tree of life
branches of life
web of life
16.
Explain why the classic tree model needs to be revised.
The model is unable to incorporate DNA evidence.
The model is erroneously based on many analogous traits, which have no basis in evolutionary relationships.
The model cannot be experimentally verified.
The model does not consider the possibility that genes could be transferred between unrelated species.
17.
Evaluate the scenarios below that compare three different ways that eukaryotic cells may have evolved. Which comparison accurately identifies these hypotheses?
Some hypotheses propose that mitochondria were acquired first. Others propose that the nucleus evolved first. Still others hypothesize that prokaryotes descended from eukaryotes by the loss of genes and complexity.
Some hypotheses propose that eukaryotic cells are a combination of bacterial and archaeal cells. Others propose that eukaryotic cells are a combination of bacterial and fungal cells. Still others hypothesize that eukaryotic and prokaryotic cells developed independently.
Some hypotheses propose that mitochondria developed from bacterial cells. Others propose that they developed from archaeal cells. Still others hypothesize that bacteria developed from mitochondria that had been released from eukaryotic cells.
Some hypotheses propose that eukaryotic cells developed from gram-negative bacteria. Others propose that they developed from gram-positive bacteria. Still others hypothesize that both gram-positive and gram-negative bacteria contributed to the eukaryotic genome through horizontal gene transfer.
18.
(credit: modification of work by Maria C Rivera and James A Lake/ResearchGate)
The images show various models that explain the phylogenetic relationships between two yeasts (Y1 and Y2), two protobacteria (Pg and Pa), a cyanobacterium (C) and three other bacteria (H, E, S). Scientists have constructed these models based on the genomes of these microrganisms.
Which statement about these models is correct?
It is most likely that Pa and Pg share a common ancestor. That common ancestor in turn shares a common ancestor with C.
Y1 and Y2 descended from a common ancestor in every model.
In the most likely model, E and H share a common ancestor. That common ancestor in turn shares a common ancestor with C.
In the least likely model, C and Pa are closely related.
19.
In a transformation experiment, a sample of E. coli bacteria was mixed with a plasmid containing the gene for resistance to
the antibiotic ampicillin (ampr). Plasmid was not added to the second sample. Samples were plated on nutrient agar plates,
some of which were supplemented with the antibiotic ampicillin. The results of E. coli growth are summarized below. The
shaded area represents extensive growth of bacteria; dots represent individual colonies of bacteria. Plates that have only
ampicillin resistant bacteria include which of the following?
